CN1526348A

CN1526348A - Chair with swinging seat

Info

Publication number: CN1526348A
Application number: CNA2004100330629A
Authority: CN
Inventors: G・皮雷蒂; G·皮雷蒂
Original assignee: Pro Cord SpA
Current assignee: Pro Cord SpA
Priority date: 2003-03-04
Filing date: 2004-03-04
Publication date: 2004-09-08
Also published as: ITTO20030152A1; US6929327B2; EP1454567A1; US20040227385A1

Abstract

A chair, in particular an office chair, comprising: a base structure (12), a seat support structure (13), articulated to the base structure (12) around a transverse axis (18), an adjustable elastic device (29) to apply an elastic force between the base structure (12) and the seat support structure (13), a manually operated adjustment device (40) for varying the distance between said adjustable elastic device (29) and said transverse axis (18).

Description

Have the chair of swinging seat support

Technical field

The present invention relates to a kind of chair, particularly a kind of office chair.This office chair comprises that a polycrystalline substance, one are hinged on seat support supporting construction and an adjustable elastic device on this polycrystalline substance around transverse axis, and this elastic device provides elastic force between polycrystalline substance and seat support supporting construction.

Background technology

Traditional office chair generally has the compression spring between polycrystalline substance and seat support supporting construction.Usually, provide adjusting device, thereby this adjusting device allows the user to come the compression preloading of regulating spring to change flexible reaction force according to his/her needs.A major defect of traditional solution is that described adjusting device is installed in a position below the seat support usually, and the user is difficult to the Shen and sells and arrive this position.And known adjusting device needs a big operating physical force, makes like this to regulate to operate the difficulty that becomes.The operating physical force that must manually offer adjusting device by the user is not constant, but increases along with the increase of spring preloading.

Summary of the invention

The purpose of this invention is to provide a kind of improved chair, this chair makes and overcomes above-mentioned shortcoming and become possibility.

According to the present invention, described purpose is to obtain by following a kind of chair, and this chair has the feature of being stated in principal right requires.

Description of drawings

Referring now to subsidiary accompanying drawing one embodiment of the present of invention are described in detail, this embodiment only provides as nonrestrictive example, wherein:

Fig. 1 is the side view of the chair according to the present invention,

Fig. 2 is the rearview of the chair among Fig. 1,

Fig. 3 is the enlarged side view of the part that marked of the arrow III among Fig. 1,

Fig. 4 is the sectional view along the line IV-IV among Fig. 3,

Fig. 5 is the support of the chair according to the present invention and the partial cross section figure of adjusting device,

Fig. 6,7,8 and 9 is along the corresponding cross section of line VI-VI, VII-VII, VIII-VIII and IX-IX among Fig. 5,

Figure 10 is the support of the chair according to the present invention and the perspective view of adjusting device,

Figure 11 be the chair of another kind of alternate embodiment according to the present invention in the longitudinal section of static position,

Figure 12 be the chair of the another kind of alternate embodiment among Figure 11 in the longitudinal section that recedes the position,

Figure 13 is the cross section along the line XIII-XIII among Figure 11.

The specific embodiment

With reference to Fig. 1 and 2, office chair according to the present invention is labeled as 10.Chair 10 comprises a height-adjustable center chair post 11, has a polycrystalline substance 12 in the upper end of this center chair post 11.This polycrystalline substance 12 has a seat support supporting construction 13, fixes a seat support 14 on this seat support supporting construction 13.Chair 10 comprises a backrest 15 of fixing with back rest supports structure 16.Back rest supports structure 16 comprise two from about the polycrystalline substance 12 relatively both sides respectively to the arm 17 that extends laterally.

With reference to Fig. 3, seat support supporting construction 13 is hinged on the polycrystalline substance 12 around first transverse axis 18, and this transverse axis 18 vertically extends with the represented plane of Fig. 3.Axle 18 is positioned near the front end of polycrystalline substance 12.

The arm 17 of back rest supports structure is hinged on the polycrystalline substance around second transverse axis 19, and this second transverse axis 19 is parallel to first transverse axis 18.Second transverse axis 19 with respect to first transverse axis 18 backward and move down.

In two arms 17 of back rest supports structure each all is hinged on the seat support supporting construction 13 by corresponding connecting rod 20.Fig. 4 has shown the mode that is articulated and connected between seat support supporting construction 13 and each arm 17.Seat support supporting construction 13 comprises two staves 21 of the U-shaped cross-section that has reversing.Each connecting rod 20 has two ends separately, and above-mentioned end is hinged on respectively on seat support supporting construction 13 and the back rest supports structure 16.As shown in Figure 4, each edge joint bar 20 is hinged by first pivot 22 and corresponding stave 21, and is hinged by second pivot 23 and corresponding arm 17.

Pivot

22,23 defines corresponding jointed shaft, and above-mentioned axle is parallel and mobile backward with respect to

axle

18,19, and jointed shaft is located backward and upwards with respect to axle 23.This arrangement makes the oscillating motion of seat support and backrest synchronous mutually.The angle of oscillation of seat support and backrest is interrelated, and being in sweptback position the user like this provides the most comfortable state to the user.

With reference to Fig. 5, polycrystalline substance 12 has a rectangular shape substantially in plane.Two staves 21 that are included in 13 li of seat support supporting constructions relative two side direction from about the polycrystalline substance 12 extend laterally.

Fig. 8 has shown that stave 21 is hinged on the state on the polycrystalline substance 12.Polycrystalline substance preferably has two concentric cylinder accessories 22, and above-mentioned accessory 22 begins to stretch out from the respective side walls 23 of polycrystalline substance 12.Two cylinder accessories 22 have a shared transverse axis that limits jointed shaft 18, and stave 21 is hinged around this shared transverse axis.Each described stave 21 has a through hole 24, and this through hole 24 holds corresponding cylinder accessory 22.Thereby outer cylinder surface and the rotation of the outer cylinder surface in hole 24 mode that contact of each stave 21 by the accessory 22 of side is hinged on the polycrystalline substance 12 around axle 18.Stave 21 obtains with respect to the mode that the fixedly usefulness of polycrystalline substance 12 on the direction of transverse axis 18 describes below.

To Figure 10, polycrystalline substance 12 has one to be supported and governor motion with reference to Fig. 5, and this mechanism provides an elastic force between polycrystalline substance 12 and seat support supporting construction.With reference to Fig. 9, seat support supporting construction 13 comprises a metallic plate 25 that is fixed on the stave 21 especially.Metallic plate 25 has the hole 26 that is used for fixing seat support 14.

With reference to Fig. 5,7 and 10, polycrystalline substance 12 has a fixing spring 27, and this spring 27 provides an elastic force for the metallic plate 25 that is biased under the seat support 14 to the direction of resting position.Although the resting position of chair is when the user is not sitting on the chair or the user is sitting on the chair but residing position when not swinging seat support and backrest backward.Fixing spring 27 preferably is made up of spiral helicine spring, this fixing spring 27 with compressive state between the diapire 28 of plate 25 and polycrystalline substance 12.Spring 27 is settled by this way, so that when seat support was in resting position, spring 27 had certain preloading.Spring 27 is in a fixed position with respect to polycrystalline substance 12, and its preloading is uncontrollable.The elastic force of the minimum that provides for seat support supporting construction 13 is provided this spring.

Chair according to the present invention comprises an adjustable elastic device 29, and this elastic device 29 provides an additional elastic force for seat support supporting construction 13, and the elastic force that this elastic force and fixing spring 27 produced produces makes a concerted effort and acting in conjunction.With reference to Fig. 5,7,9 and 10, adjustable elastic device 29 comprises a supporter 30, and this supporter 30 can move along longitudinal direction with respect to polycrystalline substance 12.As shown in Figure 9, supporter 30 preferably has groove 32, and above-mentioned groove 32 and a pair of longitudinally guiding rib 33 engage slidably, and above-mentioned rib 33 protrudes from the diapire 28 of supporting construction 12.

Adjustable elastic device 29 has one or more compression springs.Among the embodiment shown in the figure, adjustable elastic device 29 comprises the helical spring 31 of two compressive states that are arranged in parallel and are in.The quantity of spring 31 and shape can easily change.Each spring 31 and corresponding parts 32 that are used to provide load are associated.Each parts 32 that is used to provide load have a head 33 and a handle 34, and this handle 34 is positioned at corresponding spring 31 the insides, and with spring 31 coaxial extensions.Especially as shown in Figure 9, supporter 30 has two tubulose ledges 35, and this ledge 35 extends in vertical direction and forms guiding for the handle 34 of the parts 32 be used to provide load.Each tubulose ledge 35 all has an inside brake surface 36.Each handle 34 that is used to provide the parts 32 of load all has a drag washer 37, and above-mentioned drag washer 37 is fixed on the handle 34 by screw 38.Each spring 31 all upwards pushes away the corresponding component 32 that is used to provide load.Fig. 9 has shown the upwards maximum position of extending of the parts 32 that are used to provide load.This position is that the application position with the corresponding brake area 36 of facing of packing ring 37 limits.Fig. 7 and 9 has shown the seat support supporting construction 13 that is in resting position.Press unluckyly backward when the user moves his/her weight, chair recedes with respect to resting position by the swing of jointed shaft 18.

In the resting position of chair, spring 27 is when providing an elastic force to seat support, and adjustable elastic device 29 does not provide any power to seat support.Shown in Fig. 7 and 9,, be used to provide top 33 lower surface 39 of contact plate 25 (plate 25 is included in the seat support supporting construction 13) not of the parts 32 of load in the resting position of seat support.Shown in Fig. 7 and 9, lower surface 39 and the distance that is used to provide between the upper end of parts 32 of load are very little.When seat support backward after the minimal tilt, the parts 32 that are used to provide load contact with the seat support supporting construction, and they provide an elastic force to seat support when this position, and the power that this elastic force and fixing spring 27 produced produces makes a concerted effort and acting in conjunction.

Adjustable elastic device 29 can move with respect to polycrystalline substance 1 in a longitudinal direction, so that change the torque of the elastic reactance that offers seat support supporting construction 13.The length travel of adjustable elastic device 39 has changed the elasticity arm that is produced by spring 31, and this elasticity arm is with respect to the jointed shaft 18 of seat support supporting construction 13.The torque of oscillating motion opposite reaction backward of the change permission adjusting of the arm of force and seat support, backrest.Notice that when seat support is in resting position it is important not contacting between seat support supporting construction and the adjustable elastic device 29 in the lengthwise movement scope of adjustable elastic device 29.So the preloading power that the user does not need to overcome spring just can be regulated reaction force.The user just can regulate the elastic reactance of chair with very little, a constant operating physical force like this.Adjusting must be carried out the chair that is in resting position, so that in the operating process of regulating, the user must avoid receding against backrest.

Following description is the first-selected embodiment of an adjusting device, and this adjusting device is arranged the lengthwise movement of adjustable elastic device 29.Described device can replace with any device or mechanism that other can arrange the length travel of supporter 30.

With reference to Fig. 5,7,8 and 10, supporting construction 12 has an adjusting device 40 that comprises a cross bar 41, and cross bar 41 and jointed shaft 18 are coaxial and fixed by polycrystalline substance 12, and is free to slide around self the longitudinal axis.The core of bar 41 extends in the polycrystalline substance 12 in the horizontal, and at this core, bar 41 has two

thread segments

42,43 that have mutual for reverse screw

thread.Thread segment

42,43 with by matching in 44,45 li respective threads holes that form of two slide blocks, this

slide block

44,45 can be slidably mounted in the horizontal with respect to 46 li of the fixing director elements of polycrystalline substance 12.This director element 46 has the C shape sliding seat that stops

slide block

44,45 rotations.

An end of bar 41 is fixed on the operation knob 47, and the user can be rotated operation so that the domination adjustment movement to this operation knob 47.

Adjusting device 40 comprises a pair of

bar

48,49, each bar has one first terminal and one second end, above-mentioned first end is hinged on the

corresponding slide block

44,45, and above-mentioned second end is hinged on vertical shiftable support 30 of adjustable elastic device 29.The user around axle 18 rotations, makes

slide block

44,45 nearer movably or farther each other by knob 47 domination bars 41.

Slide block

44,45 towards adjacent to each other or away from motion make rear portion or the anterior lengthwise movement of supporter 30 towards chair.

As previously mentioned, in the adjustment movement process, elasticity transposition 29 is load not, so the user provides very little torque just can overcome the frictional force of governor motion 40 fully for knob 47.

Chair 10 also can have locking device 50, and this device 50 is used for locking chair and backrest in the position of the selectable a series of inclinations of user.

With reference to Fig. 5,7,8 and 10, device 50 comprises a braking pivot 51, this pivot 51 have one hinged or be fixed on upper end on the plate 25 of seat support supporting construction 13.Braking pivot 51 has a plurality of annular grooves 52 and has a braking member 53 in the lower end of braking pivot 51, and this element 53 is at 54 li of the pilot holes can slide in vertical direction (Fig. 7) of polycrystalline substance 12.Braking member 53 arrive and the upper end in hole 54 in abutting connection with the time the position be and the resting position of seat support corresponding (Fig. 7).

Locking device 50 comprises a securing rod 55, and this securing rod 55 is hinged on the polycrystalline substance 12 around vertical axis.Securing rod 55 is movably between non-locked position and latched position.Bar 55 has a hook-like ends 56, is scheduled to and brakes one of them joint of the annular groove 52 of pivot 51 in this hook-like ends 56 of latched position.Securing rod 55 and a vertical driven rod 57 are associated.Vertically driven rod 57 has two springs 58, and above-mentioned spring 58 acts on the annex 59 of securing rod 55.Vertically the front end of driven rod 57 is hinged on the bar 60, and bar 60 is fixed to the end of tubular sleeve 61, and sleeve pipe 61 is fixed on the outer surface of cross bar 41 in coaxial mode.Tubular sleeve 61 is fixed on one second sleeve pipe 61 with an action bars 63, and this action bars 63 can manually be moved between latched position and non-locked position by the operator.Sleeve

pipe

61,62 makes driven rod 57 lengthwise movements around the rotation of axle 18.Conversely, driven rod 57 pushes away to latched position or non-locked position by spring 58 barres 55.When bar 55 was pushed latched position to, if one of them of the annular groove 52 of braking pivot 51 just in time arrives on the hook-like ends 56 of bar 55, bar 55 was shifted to latched position immediately.If the hook-like ends 56 of bar 55 contact ring connected in star 52 not on the contrary, when user one changes the angle of seat support, hook-like ends 56 will flexibly be pushed latched position to by spring 58, and it will be bonded on 52 li of grooves.When bar 55 engaged with annular groove 52, seat support and backrest just were locked on the selected angle position.The locking of seat support and non-locking swing by bar 63 are controlled.

With reference to Fig. 5 and 10, chair 10 further has a device 64 that is used for regulating the upright position of polycrystalline substance 12.Described device comprises a tubular sleeve 65, and this sleeve pipe 65 and cross bar 41 are coaxial and be fixed on the action bars 66.Bar 66 and one second vertical transmission shaft 67 are hinged, the domination bar 68 that these transmission shaft 67 operations have a part 69, and this part 69 acts on the upper end of gas spring (not shown), the vertical displacement of this gas spring operation polycrystalline substance 12.Tubular sleeve 65 has an operation part, and this operation part can be by user's manual operation.

The

tubular sleeve

65 and 62 that is fixed on the opposite end of cross bar 41 has corresponding discoidal bearing

portions

71,72, and these bearing

portions

71,72 crosswise fixed are on stave 21.Tubular sleeve 62 usefulness pins or elastic ring 73 (Fig. 5) be fixed on bar 41 axially on.Operation knob 47 is done as a whole rotation together by pin 74 and cross bar 41.

Prop up

accessory

47,70 and 63 and all be positioned on the front portion of polycrystalline substance 12, when the user is sitting on the chair, (see Fig. 1 and 2), can easily get at.

Figure 11 to 13 has shown the embodiment of a variation of the present invention.In the embodiment of this variation, seat support 14 can move in the vertical with respect to seat support supporting construction 13.Seat support 14 is synchronous with respect to the lengthwise movement of seat support supporting construction 13 and back rest supports structure 17, seat support supporting construction 13 around oscillating motion of their

corresponding axles

19,18.

With reference to Figure 11-13, with describe in front the same, seat support supporting construction 13 comprises pair of U-shaped stave 21 and a metallic plate 25 that is fixed on the stave 21.Two longitudinally guiding elements 80 are fixed on the plate 25.Each director element 80 all engages slidably with corresponding longitudinal sliding block 81.Slide block 81 is fixed on (Figure 11-13 does not show) on the chair 14.

Each of two arms 17 of back rest supports structure 16 all has an annex 83, this annex 83 and engage at the seat 84 of corresponding 81 li formation of slide block.Annex 83 by corresponding cannelure 90 and and cannelure 90 between extend with a gap, this groove 90 is in U-shaped stave 24,

plate

25 and 80 li formation of director element.

Shown in Figure 11 and 12, each slide block 81 and corresponding director element 80 have corresponding end

stop matching surface

85,86,87 and 88.

Compare with Figure 11,12, the swing backward of back rest supports structure 16 makes slide block 81 (on fixing present 15) vertically move backward with respect to seat support supporting construction 13 and is easy to understand.

Claims

1, a kind of chair, particularly a kind of office chair comprises:

-one polycrystalline substance (12);

-one seat support supporting construction (13), this seat support supporting construction is hinged on the polycrystalline substance (12) around transverse axis (18);

-one adjustable elastic device (29), this elastic device (29) provides an elastic force between polycrystalline substance (12) and seat support supporting construction (13);

It is characterized in that: it comprises an adjusting device (40), and this adjusting device (40) can manual operation changes the distance between described adjustable elastic device (29) and the described transverse axis (18).

2, chair as claimed in claim 1 is characterized in that:

At chair (14) when being in resting position, described adjustable elastic device (29) does not provide power to seat support supporting construction (13), so that in the resting position of described seat support, the operation of described adjusting device (40) is carried out to act on adjustable elastic device (29) without any elastic reactance.

3, chair as claimed in claim 1 is characterized in that:

It comprises a fixedly elastic device (27), and this device (27) provides an elastic force between polycrystalline substance (12) and seat support supporting construction (13), and this elastic force trends towards a seat support supporting construction (13) and pushes described resting position to.

4, chair as claimed in claim 2 is characterized in that:

Adjustable elastic device comprises a supporter (30), this supporter (30) can be along the longitudinal movement and have at least one flexible member (31) with respect to polycrystalline substance (12), and the parts (32) that this element (31) and at least one are used to provide load are associated.

5, chair as claimed in claim 4 is characterized in that:

In the described resting position of seat support (14), be used to provide described parts (32) discord seat support supporting constructions (13) contact of load.

6, chair as claimed in claim 5 is characterized in that:

Manually operated adjusting device (40) comprises a cross bar (41), this cross bar (41) can be associated around the transverse axis rotation and with a connecting gear with respect to polycrystalline substance (12), because the effect of described cross bar (41) rotation, this connecting gear impel above support (30) to move in the vertical.

7, chair as claimed in claim 6 is characterized in that:

Described bar (41) is along the coaxial extension of jointed shaft between polycrystalline substance (12) and seat support supporting construction (13).

8, chair as claimed in claim 1 is characterized in that:

It comprises a back rest supports structure (16), and this back rest supports structure (16) is hinged on the polycrystalline substance (12) around second transverse axis (19), and this second transverse axis (19) is parallel to the jointed shaft between seat support supporting construction (13) and polycrystalline substance (12).

9, chair as claimed in claim 8 is characterized in that:

It comprises at least one connecting rod (20), the end of this connecting rod (20) is hinged on respectively on seat support supporting construction (13) and the back rest supports structure (16), so that seat support supporting construction (13) and back rest supports structure (16) are synchronous mutually around the oscillating motion of corresponding axis (18,19).

10, chair as claimed in claim 1 is characterized in that:

It comprises a locking device, and this locking device is used for a seat support (14) and is locked in the selected position of user.

11, chair as claimed in claim 10 is characterized in that:

Described locking device comprises a locking pivot (51), this locking pivot (51) is born by seat support supporting construction (13) and can be moved in vertical direction with respect to polycrystalline substance (12), this locking device comprises a securing rod (55), and this securing rod (55) is scheduled to and goes up a plurality of annular grooves (52) that form at described locking pivot (51) cooperate.

12, chair as claimed in claim 11 is characterized in that:

Described securing rod (55) is connected with a vertical driven rod (57), and this vertical driven rod (57) can move in the vertical between latched position and non-locked position and be associated with a rotatable operation sleeve pipe, and this operation sleeve pipe is by user's manual operation.

13, chair as claimed in claim 1 is characterized in that:

It comprises a device, this device is used for regulating the height of polycrystalline substance (12) and comprises a rotatable sleeve pipe (65), a this rotatable sleeve pipe (65) and a vertical driven rod (67) are associated, and the domination parts (68) of this a vertical driven rod (67) and a gas spring cooperate.

14, chair as claimed in claim 1 is characterized in that:

It comprises a seat support (14), and this seat support (14) can move with respect to the seat support supporting construction in the vertical.

15, chair as claimed in claim 14 is characterized in that:

The lengthwise movement of seat support (14) and seat support supporting construction are synchronous around the oscillating motion of described transverse axis (18).

16, chair as claimed in claim 15 is characterized in that:

It comprises a back rest supports structure (16), this back rest supports structure (16) comprises a pair of arm (17) with corresponding accessory (83), this annex (83) and corresponding longitudinal sliding block (81) engage, and it is last and removable with respect to seat support supporting construction (13) in the vertical that this slide block (81) is fixed on seat support (14).